postfix open relay

stomach · 06-26-2014, 05:37 PM

on the site http://mxtoolbox.com/diagnostic.aspx appears in orange:

SMTP Server Disconnected May be an open relay.

How do I fix this problem?

my main.cf

stomach · 06-26-2014, 07:50 PM

help please

stomach · 06-27-2014, 08:11 AM

The orange icon is not open relay problem?

http://mxtoolbox.com/diagnostic.aspx

TB0ne · 06-27-2014, 08:50 AM

Quote:

Originally Posted by stomach

help please

Please be aware that this is a VOLUNTEER FORUM...coming back and bumping your own thread after 2 hours doesn't get you an answer any quicker. It's fairly rude, and all you succeeded in doing is removing your post from the zero-reply list, making it LESS VISIBLE, and less likely to be answered.

The free tests are worth every penny you're paying, and if you have any questions about those test, you should contact the owners/operators of them. The postfix documentation is fairly extensive:
http://www.postfix.org/SMTPD_ACCESS_README.html

..have you read through it, regarding relaying? And there are thousands of easily-found documents regarding postfix relaying, since you're obviously in a hurry. Adding:

Code:

smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
smtpd_sender_restrictions = reject_unknown_sender_domain
reject_unknown_sender_domain

...to your configuration would do the trick. Bear in mind that if you read some of the comments from the mxtoolbox forums, you'd see that many others get false positives for this very test.
http://community.mxtoolbox.com/forum...hp?f=5&t=12413

stomach · 06-27-2014, 10:20 AM

I noticed that the orange is not open...

Code:

More Information About Smtp Server Disconnected
We were able to connect to your email server on port 25 but your server disconnected before we sent a QUIT command.  This may be due to a network problem, or could be an anti-spam feature of your email system.

false-positive ?

How do I get green on the test?

TB0ne · 06-27-2014, 11:55 AM

Quote:

Originally Posted by stomach

I noticed that the orange is not open...

Code:

More Information About Smtp Server Disconnected
We were able to connect to your email server on port 25 but your server disconnected before we sent a QUIT command. 
This may be due to a network problem, or could be an anti-spam feature of your email system.

false-positive ?
How do I get green on the test?

Again, you should contact the people who run that website/tool, and ask them. We have NO IDEA what they do, why, or how. If you put the configuration lines as they were given to you in your configuration, and restart postfix, you won't be running an open relay.

That said, did you understand the message from the 'test'? It says specifically that your server disconnected, which could be an anti-spam feature of your mail system. That is basically saying that while they could CONNECT, they couldn't DO anything...meaning you don't have an open relay, and (again), the test is bringing back a false positive...and that's why.